Page 4 Decoder MX620 - MX622, MX630 - MX632 Sound Decoder MX640 - MX648 2 Technical Information Allowable Track voltage **) ...................................................................................... minimum 10 V MX620, MX640 (discontinued) ....................................................... max. 24 V MX621, MX622, MX646, MX647, MX648 ....................................... max. 35 V MX630, MX631, MX632, MX644, MX645, … Digital or DC analog…. max. 35 V MX630, MX631, MX632, MX642 operated with AC analog pulse…... max. 50V Maximum continuous motor current. MX620, MX621, MX622, MX648 .................................... 0.8 A MX630, MX646 ............................................................. 1.0 A MX631, MX640, MX642, MX643, MX644, MX645 … ..... 1.2 A MX632 .......................................................................... 1.6 A Peak motor current…………………..MX620, MX621, MX646, MX648 ...……………………….1.5 A MX630 - MX632, MX640 - MX645 for @ 20 sec…….….2.5 A Maximum total function output, continuous *)………. MX620, MX621. MX646 ...................... 0.5 A MX630 - MX632, MX640 - MX645 .................................. 0.8 A Maximum continuous current for LED outputs ....…MX640, MX642, MX644……………... 10 mA ea Maximum continuous total current (motor and functions)…… = maximum continuous motor current Operating temperature ............................................................................................ - 20 to 100 o C MX640 - MX648: Memory size for sound samples…………………….. 32 Mbit (= 180 sec. at 22 kHz) MX640 - MX648: Sample rate……depending on sound sample………………………..…11 or 22 kHz MX640 - MX648: Number of independent sound channels …………………………………………… 4 MX640 - MX648: Sound amplifier output (Sinus)…. (MX640, MX646, MX648) 1.1W, (others) 3 W MX640: Loud speaker impedance…………...(MX640, MX646, MX648) 8 Ohm, (others) from 3 Ohm Operating temperature … ................................................................................. …. - 20 to 100 o C Dimensions (L x W x H) … ............ MX620, MX620N (excluding pins) …. ............ 14 x 9 x 2.5 mm MX621, MX621N (excluding pins)...……..….12 x 8.5 x 2.0 mm MX622, MX622P16 (excluding pins) .............. 16 x 9 x 2.5 mm MX630, MX630P16 (height w/o pins) ......... 20 x 11 x 3.5 mm MX631, MX631D .................................. 20.5 x 15.5 x 4.0 mm MX632, MX632D ..................................... 28 x 15.5 x 4.0 mm MX646 ......................................................... 28 x 10.5 x 4 mm MX648 ............................................................ 20 x 11 x 4 mm MX640 ...................................................... 32 x 15.5 x 6.0 mm MX642, MX643, MX644, MX645 ................... 30 x 15 x 4.5 mm *) The short circuit protection is carried out for the total current of all outputs. Use the “soft start” option (i.e. CV #125 = 52) to prevent cold-start problems of light bulbs (in-rush current interpreted as a short circuit, which leads to the output being turned off)! **) Note when operating with a DiMAX command station (Massoth): The DiMAX 1200Z command station is designed to keep the track voltage at 24V (which would exceed the DCC norm only marginally). In reality however the voltage laid on the track varies with the load (especially older command stations); starting at 30V at idle (dependent of mains voltage). Most ZIMO decoders, with the exception of the MX620, are able to deal with the excessive voltage; the MX640 however just barely (It is unlikely that a MX620 decoder is used with a DiMAX command station). Lowering the track voltage to an allowable level by adding a “fake load” (about 0.5A) would be an advantage to the regulating circuit. **) Roco Lokmaus Systems also tend to put excessive idle voltages on the track (although not as serious, @ 26V), which could present a problem for the MX620 decoder. Other ZIMO decoder types would not be affected. Disclaimer related to Märklin/Trix locomotives (especially with C-Sinus): Märklin/Trix is not concerned about compatibility of their locomotives with third party products. Their decoder interfaces change often without notice. ZIMO can therefore not guarantee that the method of connection and operation described in this manual is possible with every locomotive. We are equally not liable for damages or destruction of locomotives and/or decoders as a result of mismatched interfaces. Software Update: ZIMO DCC decoders are equipped to handle software updates by the user. An update device such as the ZIMO decoder update module MXDECUP, from 2011 MXULF, system-cab MX31ZL or command station MX10) is required. The update process is carried out by a USB stick (MXULF, MX31ZL / MX10) or by a PC with Windows operating system and the program “ZIMO Sound Program” ZSP or the “ZIMO Rail Center” ZIRC (MXDECUP). The same hardware and software is also used to load sound projects into ZIMO sound decoder. There is no need to remove the decoder or to open up the locomotive. Just set the locomotive on a section of track connected to the update module and start the update with the computer or other equipment mentioned above. NOTE: Equipment inside the locomotive that is powered directly from the track (not through the decoder) can interfere with the update procedure. The same goes for energy buffers that are installed without heeding the advice in the “Installation and wiring” chapter, section “Use of an external energy source” (regarding a choke coil). See the last chapter in this manual for more information on updating decoders or www.zimo.at ! SW updates can of course be done through ZIMO or your ZIMO dealer for a small fee. Overload and Thermal Protection: The motor and function outputs of ZIMO decoders are designed with lots of reserve capacities and are additionally protected against excessive current draw and short circuits. Cutouts are encountered if the decoder is overloaded. Even though the decoder is well protected, do not assume it is indestructible. Please pay attention to the following: Faulty decoder hook-up, connecting the motor leads to track power for instance or an overlooked connection between the motor brushes and rail pick-ups is not always recognized by the overload protection circuit and could lead to damage of the motor end stage or even a total destruction of the decoder. Unfit or defective motors (e.g. shorted windings or commutator) are not always recognized by their high current consumption, because these are often just short current spikes. Nevertheless, they can lead to decoder damage including damage to end stages due to long-term exposure. The end stages of loco decoders (motor as well as function outputs) are not only at risk of high current but also voltage spikes, which are generated by motors and other inductive consumers. Depending on track voltage, such spikes can reach several hundred volts and are absorbed by special protection circuits inside the decoder. All ZIMO decoders are equipped with temperature sensors to measure their own operating temperature. Power to the motor will be turned off once that temperature exceeds 100 0 C. The headlights start flashing rapidly, at about 5 Hz, to make this state visible to the operator. Motor control will resume automatically after a drop in temperature of about 20 0 C, typically in 30 to 60 seconds.
Decoder MX620 - MX622, MX630 - MX632 Sound Decoder MX640 - MX648 Page 5
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